docs: def delete_fields(self, form_id, field_ids):
          """
          Remove fields from a form
  
          :param form_id: int
          :param field_ids: list|tuple
          :return: dict|str
          """
  
          response = self._client.session.delete(
              '{url}/{form_id}/fields/delete'.format(
                  url=self.endpoint_url, form_id=form_id
              ),
              params={'fields': field_ids}
          )
          return self.process_response(response)